At 02.00 hours on 7 Feb 1943, U-77 fired a spread of four torpedoes at convoy KMS-8 80 miles west of Algiers and sank the ships in station #13 and #14, the Empire Webster and Empire Banner.

The master, 49 crew members, one gunner and eight Army personnel from the Empire Webster (Master Alexander Roderick Duncan) were picked up by HMCS Camrose (K 154) (T/Lt L.R. Pavillard, RCNVR) and landed at Algiers. Three crew members and one gunner were lost.